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A First Course in Probability (10th Edition)
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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I don’t know how to calculate ‘d.’ into my TI-84 Plus calculator. Please show me step by step.
HDL is the "good" cholesterol. The higher a person's HDL level, the lower the person's risk of heart attack and stroke will be. In a study of 1747 women in their twenties, the women's HDL cholesterol levels are approximately normally distributed with mean 52 mg/dl and standard deviation 15.1 mg/dl. Complete parts (a) through (d) below. Click here to view page 1 of the standard normal distribution table, Click here to view page 2 of the standard normal distribution table a. According to a reputable health organization, a woman has low HDL (higher risk) if her HDL reading is less than 50 mg/dl. Find the probability that a woman randomly selected from the 1747 women has low HDL. P(x< 50) = 0.4473 (Round to four decimal places as needed.) b. According to a reputable health organization, a woman has high HDL (lower risk) if her HDL reading is greater than 60 mg/dl. Find the probability that a woman randomly selected from the 1747 women has high HDL P(x> 60) = 0.2981 (Round to four decimal places as needed.) c. Find the probability that a woman randomly selected from the 1747 women has an HDL reading between 30 and 60 mg/dl. P(30 <x<60) = 0.6293 (Round to four decimal places as needed.) d. Find the number of women in the study who have HDL readings between 30 and 60 mg/dl. women (Round to the nearest integer as needed.)
Transcribed Image Text:HDL is the "good" cholesterol. The higher a person's HDL level, the lower the person's risk of heart attack and stroke will be. In a study of 1747 women in their twenties, the women's HDL cholesterol levels are approximately normally distributed with mean 52 mg/dl and standard deviation 15.1 mg/dl. Complete parts (a) through (d) below. Click here to view page 1 of the standard normal distribution table, Click here to view page 2 of the standard normal distribution table a. According to a reputable health organization, a woman has low HDL (higher risk) if her HDL reading is less than 50 mg/dl. Find the probability that a woman randomly selected from the 1747 women has low HDL. P(x< 50) = 0.4473 (Round to four decimal places as needed.) b. According to a reputable health organization, a woman has high HDL (lower risk) if her HDL reading is greater than 60 mg/dl. Find the probability that a woman randomly selected from the 1747 women has high HDL P(x> 60) = 0.2981 (Round to four decimal places as needed.) c. Find the probability that a woman randomly selected from the 1747 women has an HDL reading between 30 and 60 mg/dl. P(30 <x<60) = 0.6293 (Round to four decimal places as needed.) d. Find the number of women in the study who have HDL readings between 30 and 60 mg/dl. women (Round to the nearest integer as needed.)
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